
class CreateInstancesTable < ActiveRecord::Migration
    def self.up
        create_table :instances do |t|
            t.column :instance_id, :string
            t.column :event_date, :datetime
            t.column :from_state, :string
            t.column :to_state, :string
        end    
    end

    def self.down
        drop_table :instances
    end
end
